Exchange 2003 calendar item not being backed up by Back up exec

We have a users recurring calendar item which is currently scheduled for dec 2013 which is not being backed up in backup exec.
Backup exec reports all ok and says granular full backup was succesful. i can restore the calendar to PST and when i compare calendars (item was accepted back in july 2013) this one particular event doesnt show.

the concern is that there are items which arent being backed up and not being reported either. The email server is exchange 2003 with backup exec 2012

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